please let me know if the answer is true or false. if false, please tell me what's false about it. the word that they are wondering if it needs to be changed is highlighted​

Answer:

they all form diatomic molecules.

for example: H2, F2, Cl2, Br2, I2, and At2) and they all form negatively charged ions H-, F-, Cl-, Br-, I-, and At- .

Answer:

Density of the object is 8759.494 grams/L

Explanation:

As we know density of an object is mass of the object divided by its volume

Given

Volume of the object is equal to the change in volume of water with in the cylinder when the object was immersed in water.

Hence, volume of object is equal to

[tex]32.9 -25 = 7.9[/tex] mL

Mass of the object is [tex]69.2[/tex] grams

Density

[tex]= \frac{69.2}{7.9 *10^{-3}}\\= 8759.494[/tex] grams/L

Density of the object is 8759.494 grams/L

Answer:

Explanation:

Step 1

The question is based on the concept of PH and pOH calculations.

pH is defined as negative logarithmic of hydronium Ion concentration.

while pOH is defined as negative logarithmic of hydroxide ion concentration of the solution.

Step 2

[H+] = 7.7*10-7  M  

pH = -log[H+]  

    = -log ( 7.7*10-7 )

     = 6.12

Step 3

pOH = 14 - pH

   = 14 - 6.11

  = 7.89

Answer:

Don't know if I know itat all

Explanation:

what is red data list

Answer: well I don’t have either picture but here goes anyway. It could be that the suns rotation matched up with the moon being 400 miles away from it and 400 times bigger it could be in image 1 the sun is only at a partial eclipse. With no images kinda had to wing it but I hope it helps :D

A lunar eclipse is an event that occurs when the sun, moon, and earth are aligned. It is happening in image 2 as Earth is obstructing the sun’s light.

In lunar eclipse Earth completely covers the surface of the moon which makes the surface look red and dark. It happens only when the Moon is opposite the sun in the sky.

It is not seen in the first image as the earth is incapable of totally blocking the sunlight and hence does not result in a lunar eclipse. In the second image, the Earth has covered the whole surface of the moon and hence is blocking the sunlight.

Therefore, a lunar eclipse is seen only in image 2.

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Answer:

The Watt

Explanation:

Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second.

The amount of energy transferred per unit time is called power, and power is measured in Watt.

Watt is the unit of power. It is used to measure the transfer of power. This is named after James Watt.

When one joule of energy is transferred in one second, this is the power of the Watt.

Thus, the amount of energy transferred per unit time is called power, and power is measured in Watt.

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Answer:

Properties of transition elements

they are all metals and that most of them are hard, strong, and lustrous, have high melting and boiling points, and are good conductors of heat and electricity.

Answer:

Surface

Explanation:

Explanation:

0 10 grams that that should be the answer

Answer:

Option A

Explanation:

The total heat absorbed during the chemical reaction is the total heat released by the surrounding.

Net change of heat is equal to zero

Hence, the energy liberated from the air or the walls of the containers would be equal to the energy absorbed by the chemical reactions is equal to 100 Kj

Thus, option A is correct

Answer: To efficiently communicate with others

Explanation:

this was the right on answer for me might be different for others

The main need or want the wave technology shown meets to see objects surrounding more clearly.

It is a floating device that operates in the same direction as the waves. With the use of the technology, energy may be captured even from relatively small waves. The device that is moved by waves activates a hydraulic system that can power a generator. The tube segment contains all the generation equipment and systems.

Early mechanization (1770s to 1830s), steam power and railroads (1830s to 1880s), electrical and heavy engineering (1880s to 1930s), Fordist mass production (1930s to 1970s), and information and communication are the five waves that have so far slammed into our society (1970s to 2010s).

Wave energy, also known as wave power, is the energy that ocean surface waves carry and absorb. The energy is then put to use in a variety of productive ways.

Thus, The main need or want the wave technology shown meets to see objects surrounding more clearly.

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Answer:

Methyl orange is an indicator which turns yellow in an alkaline solution.

Answer:

i think its (methyl orange)

Answer:

Hi ,

Answer :

Sulfuric acid

Answer:

8.43 x 1024 moles of I

Explanation:

Answer:

[tex]2H_2 + O_2 -> 2 H_2 O[/tex]

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 0.24moles of propane gas would be present in 11 grams of the gas at standard conditions.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically,

mole of substance =given mass of substance ÷ molar mass of substance

Molar mass of 1 mole of propane gas= 44.0956 g/mol

Given mass of propane gas=11 grams

Substituting all the given values in the above equation, we get

mole of substance =11 grams ÷44.0956 g/mol

mole of substance =0.24moles

Therefore, 0.24moles of propane gas would be present in 11 grams

of the gas at standard conditions.

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Answer: Subatomic particle which orbits the nucleus is electron.

Explanation:

Every atom contains three sub-atomic particles. These are protons, neutrons and electrons.

Protons contain a positive charge, neutrons have no charge and electrons have a negative charge.

Both protons and neutrons reside inside the nucleus of the atom whereas electrons reside outside the nucleus of atom and revolve around the nucleus.

Therefore, it is concluded that subatomic particle which orbits the nucleus is electron.

Answer: The energy of a photon with a wavelength of 820 nm is [tex]2.42 \times 10^{-19} m[/tex].

Explanation:

Given : Wavelength = 820 nm

Convert nm into meter as follows.

[tex]1 nm = 10^{-9}\\So, 820 nm = 820 nm \times \frac{10^{-9} nm}{1 nm}\\= 820 \times 10^{-9} m[/tex]

The relation between energy and wavelength is as follows.

[tex]E = \frac{hc}{\lambda}[/tex]

where,

E = energy

h = Planck's constant = [tex]6.63 \times 10^{-34} kg m^{2}/s[/tex]

c = speed of light = [tex]3.0 \times 10^{8} m/s[/tex]

[tex]\lambda[/tex] = wavelength

Substitute the values into above formula as follows.

[tex]E = \frac{hc}{\lambda}\\= \frac{6.63 \times 10^{-34} kg m^{2}/s \times 3.0 \times 10^{8} m/s}{820 \times 10^{-9} m}\\= \frac{1.989 \times 10^{-25}}{820 \times 10^{-9}}\\= 2.42 \times 10^{-19} m[/tex]

Thus, we can conclude that energy of a photon with a wavelength of 820 nm is [tex]2.42 \times 10^{-19} m[/tex].

Hydrogen bond will be formed when the end of the O₂ molecule that is

closest to the positive end of the H₂O molecule.

These are referred to as electrostatic force which occurs between

Hydrogen atom and other electronegative atom bearing a lone pair of

electrons.

Oxygen is electronegative and has lone pair of electrons which is why the

bond formed will be Hydrogen bond.

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Answer:

581 Joules.

Explanation:

Using the formula;

Q = m × c × ∆T

Where;

Q = amount of heat absorbed (J)

m = mass of substance (g)

c = specific heat capacity (J/g°C)

∆T = change in temperature (°C)

According to the information provided in this question;

Q = ?

mass of ice = 15.9g

initial temperature = -4°C

final temperature = 14°C

Hence, ∆T = 14 - (-4) = 14 + 4 = 18°C

specific heat capacity (c) of ice in J/g°C = 2.03 J/g°C

Using Q = m × c × ∆T

Q = 15.9 × 2.03 × 18

Q = 32 × 18

Q = 581 Joules.

Answer:

0.033 moles of KCl are formed.

Explanation:

The reaction that takes place is:

To solve this problem we need to convert 0.05 moles of O₂ into moles of KCl, to do so we use the stoichiometric coefficients of the balanced reaction:

If 0.05 moles of O₂ are produced, then 0.033 moles of KCl are formed as well.

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

[tex]acceleration = \frac{force}{mass} \\[/tex]

We have

[tex]a = \frac{3000}{1000} = 3 \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

The reactant that produces a lesser amount of product is the limiting reagent. The reactant that produces a larger amount of product is the excess reagent. To find the amount of remaining excess reactant, subtract the mass of excess reagent consumed from the total mass of excess reagent given.

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Answer:

Q = 306 kJ

Explanation:

Given that,

Mass, m = 60 kg

Specific heat, c = 1020 J/kg°C

The temperature changes from 20°C to 25°C.

Let Q be the change in thermal energy. The formula for the heat released is given by :

[tex]Q=mc\Delta T[/tex]

Put all the values,

[tex]Q=60\times 1020\times (25-20)\\\\Q=306000\ J\\\\or\\\\Q=306\ kJ[/tex]

So, 306 kJ is the change in thermal energy.

Answer:

Oxidation Reduction

Explanation:

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Answer:

1.) The possible genotypes are FF and Ff

The phenotype is full pod shape

2.) The possible genotypes are GG, Gg, and gg

The photypes are Green (for those whose genotype is GG and Gg) and yellow ( For those whose genotype is gg)

Explanation:

My hand writting isn't the best so I'll also type it.

1.) There are only 2 possible genotypes the offspring can have which are FF or Ff.

Because the dominant allele is F all the offspring from this cross will have a full pod shape phenotype.

2.) There are only 3 possible genotypes the offspring can have which are GG, Gg, and gg.

The majority of the offspring will have a green phenotype while the remainder will be yellow. G is the dominant allele so any offspring with the genotype GG or Gg will be green. While g is a recessive allele and only offspring who has a genotype of gg will be yellow.

*On my paper for question 2 for the phenotype explination I accidently wrote genotype instead of phenotype.

*Another note is that an offspring must have both recessive alleles in order to show the recessive traits. That is why gg is yellow and Gg is green.

Hope I helped